https://devzone.nordicsemi.com/f/nordic-q-a/57597/nrf52832-with-cmos-batteryI am facing an issue about using CMOS battery for NRF52832. I hope this CMOS battery can serve mcu (in low power mode) for at least 1 year. In low power mode, I just want to run an RTC. Can this be possible?en-USTelligent Community 13Thu, 13 Feb 2020 03:41:50 GMThttps://devzone.nordicsemi.com/thread/234084?ContentTypeID=1Thu, 13 Feb 2020 03:41:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e49118c8-cb07-49b0-bd9d-9d5fc84643cebeliever<p>How can I keep&nbsp;RTC running when external power is disconnected?</p> <p>I think I could detect VDD under 3.3V and disable all other module but RTC.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/233919?ContentTypeID=1Wed, 12 Feb 2020 10:07:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cdb3703f-0366-43a4-a7f9-7892fbe44f74Ameer Usman<p>VDD and GND, you can directly connect nRF52832 to the CR2032 Cell (which is rated at 3V). Keep LED link as a debugging feature to know it turned on initially.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/233917?ContentTypeID=1Wed, 12 Feb 2020 09:58:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bfd1be8b-dfd3-417f-b2d4-bfe2f4261d94believer<p>Yes, I am intending to use CR2032. How can I power NRF52832 by battery? Just connect it to VDD?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/233429?ContentTypeID=1Mon, 10 Feb 2020 06:08:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:be38f4b2-c344-4a2c-802e-e2921e9508e1Ameer Usman<p>In accordance to the operating voltage of 1.8V to 3.6V your CMOS Battery is well in that zone and it should be able to pull out a year. But the question is which battery are you intending to use? CR2032? That has a capacity of 225mAh.</p><div style="clear:both;"></div>